Frame parsing

Data Structures
struct	AVCodecParserContext
struct	AVCodecParser

Enumerations
enum	AVPictureStructure { AV_PICTURE_STRUCTURE_UNKNOWN, AV_PICTURE_STRUCTURE_TOP_FIELD, AV_PICTURE_STRUCTURE_BOTTOM_FIELD, AV_PICTURE_STRUCTURE_FRAME }

Functions
const AVCodecParser *	av_parser_iterate (void **opaque)
	Iterate over all registered codec parsers. More...
attribute_deprecated AVCodecParser *	av_parser_next (const AVCodecParser *c)
attribute_deprecated void	av_register_codec_parser (AVCodecParser *parser)
AVCodecParserContext *	av_parser_init (int codec_id)
int	av_parser_parse2 (AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
	Parse a packet. More...
attribute_deprecated int	av_parser_change (AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
void	av_parser_close (AVCodecParserContext *s)

Detailed Description

Enumeration Type Documentation

AVPictureStructure

enum AVPictureStructure

Enumerator
AV_PICTURE_STRUCTURE_UNKNOWN
AV_PICTURE_STRUCTURE_TOP_FIELD
AV_PICTURE_STRUCTURE_BOTTOM_FIELD
AV_PICTURE_STRUCTURE_FRAME

Definition at line 3370 of file avcodec.h.

Function Documentation

av_parser_iterate()

const AVCodecParser* av_parser_iterate

(

void **

opaque

)

Iterate over all registered codec parsers.

Parameters

opaque

a pointer where libavcodec will store the iteration state. Must point to NULL to start the iteration.

Returns

the next registered codec parser or NULL when the iteration is finished

Definition at line 113 of file parsers.c.

Referenced by av_parser_init().

av_parser_next()

attribute_deprecated AVCodecParser* av_parser_next

(

const AVCodecParser *

c

)

Definition at line 96 of file parsers.c.

av_register_codec_parser()

attribute_deprecated void av_register_codec_parser

(

AVCodecParser *

parser

)

Definition at line 106 of file parsers.c.

av_parser_init()

AVCodecParserContext* av_parser_init

(

int

codec_id

)

Examples

decode_audio.c, and decode_video.c.

Definition at line 34 of file parser.c.

Referenced by avformat_find_stream_info(), dash_init(), flac_read_timestamp(), LLVMFuzzerTestOneInput(), main(), old_flac_header(), read_frame_internal(), and remove_extradata_init().

av_parser_parse2()

int av_parser_parse2	(	AVCodecParserContext *	s,
		AVCodecContext *	avctx,
		uint8_t **	poutbuf,
		int *	poutbuf_size,
		const uint8_t *	buf,
		int	buf_size,
		int64_t	pts,
		int64_t	dts,
		int64_t	pos
	)

Parse a packet.

Parameters

s	parser context.
avctx	codec context.
poutbuf	set to pointer to parsed buffer or NULL if not yet finished.
poutbuf_size	set to size of parsed buffer or zero if not yet finished.
buf	input buffer.
buf_size	buffer size in bytes without the padding. I.e. the full buffer size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE. To signal EOF, this should be 0 (so that the last frame can be output).
pts	input presentation timestamp.
dts	input decoding timestamp.
pos	input byte position in stream.

Returns

the number of bytes of the input bitstream used.

Example:

while(in_len){
    len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
                                     in_data, in_len,
                                     pts, dts, pos);
    in_data += len;
    in_len  -= len;
 
    if(size)
       decode_frame(data, size);
}

Examples

decode_audio.c, and decode_video.c.

Definition at line 120 of file parser.c.

Referenced by dash_write_packet(), flac_read_timestamp(), LLVMFuzzerTestOneInput(), main(), old_flac_header(), and parse_packet().

av_parser_change()

attribute_deprecated int av_parser_change	(	AVCodecParserContext *	s,
		AVCodecContext *	avctx,
		uint8_t **	poutbuf,
		int *	poutbuf_size,
		const uint8_t *	buf,
		int	buf_size,
		int	keyframe
	)

Returns

0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed

Deprecated:

Use dump_extradata, remove_extra or extract_extradata bitstream filters instead.

Definition at line 193 of file parser.c.

av_parser_close()

void av_parser_close

(

AVCodecParserContext *

s

)

Examples

decode_audio.c, and decode_video.c.

Definition at line 228 of file parser.c.

Referenced by dash_free(), estimate_timings_from_pts(), ff_read_frame_flush(), flac_read_timestamp(), free_stream(), LLVMFuzzerTestOneInput(), main(), old_flac_header(), parse_packet(), read_frame_internal(), remove_extradata_close(), and update_stream_avctx().